Sorry, my computer skills suck..also with car jacked up, not sure if it is a freeze plug, been noticing my intercooler tank keeps getting low, think leaking intercooler somewhere as well or only...gonna try and put some red food coloring in and see at the back what color leak is since radiator wise I have done 10 water only flushes after 2 quarts Ford iron block flush and bottle of simple green...my friend Mr No Luck just loves visiting my barn

the intercooler could be cracked or I've also seen people talk about it leaking at the o-rings where the lines go to the intercooler core itself. Id definitely check on it though, you dont want the lower intake to fill up to the point you end up with water in the cylinders

I bought Mityvac MV4560 Radiator/Cooling System and Pressure Test Kit on Amazon for like $45. Ive been using that to test my cooling systems. I'll be honest its kind of a pain in the *** to sit there and squeeze that handle a million times to get up to 15psi but it does work. When I was looking a couple years ago all the better options were a lot more money.

Thanks DSG, don't think going into lower intake, no white smoke, no stumbling, car idles perfect. I ordered one off amazon, it was $80, it's a cooling system refiller/vacuum kit that uses shop air I think will work, also thougt about taking hose off the ic tank and shooting low pressure air in the hose to see if it blows fluid where the leak is, I have a metal non stock ic tank so Oem cap won't work. Also thought abut food coloring in tank and catching fluid as it leaks...this is all assuming not a coolant leak..I will update after some more troubleshooting, thanks again.

My idea worked !!Car is jacked up in front, drained IC tank and filled with water and 2 bottles red food coloring. I ran the car and put a white towel under bellhousing..came out next day and bright red spot was there...so not a coolant leak. Gonna order the IC manifold o rings..do I need a gasket as well? How hard a job is it to change those o-rings??? Also got in the 170 Stant T stat from Joe on SVT, instead of a hole has a notch that you install at 12:00. Thanks.

I can't think of what you need a gasket for on the intercooler o-rings. I only glanced through those threads in the past but Im pretty sure you dont even have to pull the intercooler/intake assembly out of the car. The Whipple might be in the way but thats the only thing I can think of.

Gasket is a just in case, it is for manifold, takes 4 o rings and I think if I go from bottom and remove pulley bridge can access lines going to intercooler. Got to put your Term hat on for this one lol. Oh, you can see difference in the Stant T stat.